This resonates with me. I have experienced the mixed feelings of wanting more after an especially great sexual encounter - be it with a paid provider, or with a regular hook up through Grindr. When you experience incredible chemistry and sexual compatibility, your brain goes into that territory of questioning if there could be more. When that happens, I'm quick to remind myself that it's next to impossible to maintain that level of intensity and avoid routine as a relationship becomes established. I know that from painful past experience - and maybe it's my fault for not knowing how to keep the sparks flying and work on perpetual re-invention of the relationship... but I've never been successful at that.
So, I choose to preserve the great sex by keeping it special - a repeat hire (or hookup) several weeks later, as schedules and life allow. The anticipation builds, the excitement returns just like, or sometimes even better than, the first time. The paid providers are easier to keep around since it's a business to them. The regular hookups not so much... but when they stick around, it can be great.